Oiling device



July 28, 1931. c. D. STEWART INVENTOR CARLTON DSTEWART rl A 40/27 744 OILING DEVICE i i t l i 3 k Filed Oct. 18 1928 BY W- ATTORNEY Patented July 28, 1931 UNITED STATES PATENT OFFICE CARLTON D. STEWART, OF BERKELEY, CALIFORNIA, ASSIGNOR TO THE WESTING- j HOUSE AIR BRAKE COMPANY, OF WILMERDING, PENNSYLVANIA, A CORPQRATION OF PENNSYLVANIA OILING DEVICE Application filed October 18, 1928. Serial No. 313,296.

This invention relates to a lubricating device, and more particularly to an automatic lubrieator for fluid compressors of the type disclosed in Patent No. 1,337,687 of C. L. Bubb, dated April 20, 1920, and reissued as Reissue Patent N 0. 15,267, dated January 17, 1922.

The principal object of my invention is to provide an improved lubricator of the above type, in which the parts may be easily disassembled for cleaning and having means whereby different lubricant feeding rates may be obtained, as desired.

In the accompanying drawing, the single figure is a central sectional view of a lubricator embodying my invention.

The lubricator may comprise a body 1 having a lubricant receiving chamber or receptacle- 2. A. discharge passage 3 extends through the neck portion 1 of the body and is connected to a pipe 5 which leads to the air cylinder of the fluid compressor.

Secured centrally within the bod is a hollow stud or tube 6, having an annu ar flange 7 which engages a bearing surface of the body. The upper end of the lubricator is closed by a threaded filling cap 8, the body being interiorly threaded to receive the cap.

Mounted on the stud 6 is a sleeve 9 having a neat slidingfit on said stud, except that at each end the bore of the sleeve is slightly enlarged, as shown at 10 and 11, so as to provide a restricted feed passage from the chamber 2, through which oil is supplied by capillary attraction to a radial passage 12 in the stud 6 which opens to the central bore 13. The bore 10 is of diflerent diameter than the bore 11, so as to provide different oil feed rates.

The sleeve 9 is also provided with one or more notches 1 1 at each end, to ensure flow of oil from the chamber 2 to the bore 10 or 11, as the case may be.

Interp-osed between the top of the sleeve .9 and the cap 8 is a thimble 15, preferably pressed out of sheet metal, and out in the upper end of the thimble is a spring clip 16. The side wall of the thimble is provided with an opening 17 In operation, liquid lubricant from chamber 2 flows through the notches l4: and rises in the bore 10 by capillary attraction, so that the lubricant enters the passage 12 and flows into the bore 13, whence the lubricant flows 7 by gravity through the passage 0 and pipe 5 to the fluid compressor cylinder to which the lubricator, is connected.

When it is necessary to again fill the chamber 2 with lubricant, the cap 8 is removed and the lubricant is poured in around the sleeve 9. The thimble 15 remaining in place, prevents the lubricant from entering the bore 18 of the stud 6.

The thimble 15 serves to hold the sleeve 9 f in place against vertical movement and the spring clip 16 ensures lost motion, due to any lnaccuracies in the fittlng of the cap 8. The opening 17 permits free flow of fluid back and forth, so that changes in fluid pres- W sure in the bore 13 due to the reciprocation of the compressor piston will be equalized in the chamber 2.

The sleeve 9 may be easily removed for cleaning, in case dirt or carbonized oil should clog the feed passages, and this is facilitated by providing the feed spaces 10 and 11 in the sleeve, rather than in the stud 6.

One of the feed bores, such as the bore 10,

may be for a slow feed, while the other bore H '11 may be slightly larger to provide a more rapid oil feed, and if the more rapid feed is desired, it is only necessary to remove the sleeve 9 and apply the same in a reversed direction to the stud 6, so that the feed bore 11 is at the lower or feed position on the stud, instead of the bore 10.

While one illustrative embodiment of the invention has been described in detail, it is not my intention to limit its scope to that embodiment or otherwise than by the terms lubricant from said chamber to said dis charge passage and adapted when applied to the first member in the reversed position. to provide a restricted passage of greater flow capacity than the first restricted passage for the supply of lubricant.

2. A lubricator comprising a'casing having a lubricant containing chamber, a tubular member mounted in said casing and having a lubricant discharge passage, a' reversible sleeve mounted on said member and spaced from said member at its opposite ends, to provide passages of diiierent flow capacities, lubricant being supplied from said chamber to said discharge passage through one passage in one position of said sleeve and through the other passage when the pos1- tion of said sleeve is reversed.

3. A lubricator comprising a casing having a lubricant containing chamber, a tubular member mounted in said casing, a sleeve slidably mounted onsaid member, the bore of the sleeve at its opposite ends being enla ged, so that in one position, one of said enlarged bores providescommunication for the supply of lubricant from said chambers, and when the position of said sleeve is reversed, the other enlarged bore provides communication for the supply of lubricant, the enlarged bores being of different flow areas.

4. A lubricator comprising a casing having a lubricant containing chamber, a tubular member mounted in said casing and having a lubricant discharge passage, a sleeve mounted on said member, a filling cap removably applied to said casing, a member interposed between said cap and said sleeve and having yielding means through which said cap presses said member against said sleeve.

5. A lubricator comprising a casing having a lubricant containing chamber, a tubular member mounted in said casing and having a lubricant discharge passage, a sleeve mounted in said member, a filling cap removably applied to said casing, and a removable cap mounted on top of said sleeve, to prevent lubricant from entering said tubular member when said chamber is being filled with lubricant. V v

In testimony whereof I have hereunto set my hand, this 8th day of October, 1928. V-

CARLTON D. STEWART. 

